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2. Lighting ratio - Wikipedia

   en.wikipedia.org/wiki/Lighting_ratio

   A key light of 800 footcandles and a fill light of 200 footcandles has a ratio of 5:1 according to the lighting ratio formula — (800 + 200):200 = 1000 / 200 = 5 : 1. The ratio can be determined in relation to F stops since each increase in f-stop is equal to double the amount of light: 2 to the power of the difference in f stops is equal to ...

3. Through-the-lens metering - Wikipedia

   en.wikipedia.org/wiki/Through-the-lens_metering

   The commander unit usually controls the remote flashes by using flashes of visible or infrared light, although TTL-capable radio triggering systems are available. The photographer can normally vary the light ratios between the different flashes. The technique of using preflashes to get a proper exposure is still used in automatic flash modes.

4. Foot-candle - Wikipedia

   en.wikipedia.org/wiki/Foot-candle

   In the US lighting industry, foot-candles are a common unit of measurement used by architects to calculate adequate lighting levels. Foot-candles are also commonly used in the museum and gallery fields in the US, where lighting levels must be carefully controlled to conserve light-sensitive objects such as prints, photographs, and paintings, the colors of which fade when exposed to bright ...

5. Exposure (photography) - Wikipedia

   en.wikipedia.org/wiki/Exposure_(photography)

   In a scene with strong or harsh lighting, the ratio between highlight and shadow luminance values may well be larger than the ratio between the film's maximum and minimum useful exposure values. In this case, adjusting the camera's exposure settings (which only applies changes to the whole image, not selectively to parts of the image) only ...

6. Available light - Wikipedia

   en.wikipedia.org/wiki/Available_light

   In some cases, ambient light may be used as a fill, in which case additional lighting provides the stronger light source, for example in bounce flash photography. The relative intensity of ambient light and fill light is known as the lighting ratio, an important factor in calculating contrast in the finished image.

7. Low-key lighting - Wikipedia

   en.wikipedia.org/wiki/Low-key_lighting

   Low-key lighting is a style of lighting for photography, film or television. It is a necessary element in creating a chiaroscuro effect. [ 1 ] Traditional photographic lighting ( three-point lighting ) uses a key light , a fill light and a back light for illumination.

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   mail.aol.com

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9. Light meter - Wikipedia

   en.wikipedia.org/wiki/Light_meter

   Use of a light meter for portrait cinematography in a Turkish music video set. A light meter (or illuminometer) is a device used to measure the amount of light.In photography, an exposure meter is a light meter coupled to either a digital or analog calculator which displays the correct shutter speed and f-number for optimum exposure, given a certain lighting situation and film speed.